A064198 a(n) = 3*(n-2)*(n-3)*(3*n^2-3*n-8)/2.

0, 0, 84, 468, 1476, 3540, 7200, 13104, 22008, 34776, 52380, 75900, 106524, 145548, 194376, 254520, 327600, 415344, 519588, 642276, 785460, 951300, 1142064, 1360128, 1607976, 1888200, 2203500, 2556684, 2950668, 3388476

Offset

2,3

References

L. Berzolari, Allgemeine Theorie der Höheren Ebenen Algebraischen Kurven, Encyclopädie der Mathematischen Wissenschaften mit Einschluss ihrer Anwendungen. Band III_2. Heft 3, Leipzig: B. G. Teubner, 1906. p. 341.

Links

Vincenzo Librandi, Table of n, a(n) for n = 2..1000

Formula

G.f.: 12*x^4*(7+4*x-2*x^2)/(1-x)^5. - Colin Barker, Feb 28 2012

Mathematica

Table[3*(n-2)*(n-3)*(3*n^2-3*n-8)/2, {n, 2, 40}] (* Vincenzo Librandi, Feb 29 2012 *)

Prog

(Magma) [3*(n-2)*(n-3)*(3*n^2-3*n-8)/2: n in [2..30]]; // Vincenzo Librandi, Feb 29 2012

Crossrefs

Sequence in context: A251293 A251254 A349682 * A329935 A233055 A233056

Adjacent sequences: A064195 A064196 A064197 * A064199 A064200 A064201

Keyword

nonn,easy

Author

Antreas P. Hatzipolakis (xpolakis(AT)otenet.gr), Sep 22 2001

Status

approved